public async Task <IdentityResult> SaveChangesAsync(CancellationToken cancellationToken)
{
try
{
await _context.SaveChangesAsync(cancellationToken);
return(IdentityResult.Succeeded());
}
catch (DbEntityValidationException ex)
{
return
(IdentityResult.Failed(
ex.EntityValidationErrors.SelectMany(ve => ve.ValidationErrors.Select(e => e.ErrorMessage))
.ToArray()));
}
}